#!/usr/bin/env python3

# Copyright (c) 2020-2021 Fpemud <fpemud@sina.com>
#
# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files (the "Software"), to deal
# in the Software without restriction, including without limitation the rights
# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
# copies of the Software, and to permit persons to whom the Software is
# furnished to do so, subject to the following conditions:
#
# The above copyright notice and this permission notice shall be included in
# all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
# THE SOFTWARE.


import re
import abc
from ._util import ActionRunner
from ._errors import CustomActionError


class PreBuildImages:

    def has_image(os_version):
        return False

    def fetch_image(os_version):
        assert False


class CustomAction(ActionRunner.CustomAction):

    @abc.abstractmethod
    def prepare(self, action_name, s, ts, work_dir):
        pass

    @abc.abstractmethod
    def run(self, action_name, s, ts, work_dir, reuse_vm=None):
        pass

    @abc.abstractmethod
    def is_exclusive(self):
        pass

    @classmethod
    def check_object(cls, obj, raise_exception=None):
        assert raise_exception is not None

        if not isinstance(obj, cls):
            if raise_exception:
                raise CustomActionError("invalid object type")
            else:
                return False

        if not isinstance(obj.is_exclusive(), bool):
            if raise_exception:
                raise CustomActionError("invalid return value for \"is_exclusive()\"")
            else:
                return False

        return True
